LocationsAs Tonga maps its coastline with pinpoint precision, a Prime Minister's words carry the weight of a nation's future, and a message for the world
The Decisions Made Today
April 6, 2026
When this survey is complete, Tonga will have achieved full national LiDAR coverage across every low-lying island.
Photo: PMO Tonga
There is a moment, stepping off the plane at Fua'amotu International Airport, that stays with you. The descent alone prepares you, the Blue Pacific Ocean filling the window in every direction, land appearing almost as an afterthought, narrow and low against the water. Then the door opens, and the Kingdom of Tonga meets you: warm air, quiet ceremony, a pace to life with its own rhythm, its own order of things.
Culture here is not preserved behind glass in a museum or gallery, it is lived. In the tapa cloth and the woven mats that mark every significant occasion. In the way people greet each other, or speak about the land and sea around them. They speak to these not as resources, but as inheritance, where tradition is not simply nostalgia. The fonua – the land – is life.
What is at stake in the face of climate change is not just an environmental question, but a civilisational one. The same low horizon that greets you on your final approach to the island of Tongatapu is the measure of everything Tonga is working to protect. Not just coastline, but all that the head and the heart hold.
Which is exactly why, in 2026, something quietly significant is happening above it.
A specialised survey aircraft is tracing the contours of Tonga's scattered islands, firing pulses of laser light toward the ground and measuring their return. The technology is called LiDAR (Light Detection and Ranging) and what it produces is a precise, three-dimensional picture of the land below: every ridge, every depression, every coastal edge that stands between a community and the sea.
When this survey is complete, Tonga will have achieved full national LiDAR coverage across every low-lying island. It is a foundation, the kind of data that makes everything else possible. Coastal flood modelling. Infrastructure planning. Sea-level rise projections. Decisions, in short, that will shape lives for decades.
A phrase belongs to Tonga’s Prime Minister, Hon. Lord Fakafanua, spoken recently with an urgency that felt less like political rhetoric and more like a reckoning:
"The decisions made today will shape our future for decades."
Lord Fakafanua said something else worth sitting with. That meeting the challenges ahead requires "a whole of government approach, not just one institution."
The LiDAR survey is that principle made visible. Multiple government ministries, the UN Development Programme, the Pacific Community (SPC), and private sector specialists are all working from the same data, toward the same goal, made possible through the Green Climate Fund-supported US$23.9 million Tonga Coastal Resilience Project (TCRP).
And what they are building, together, is knowledge. For too long, small island nations have been asked to make consequential decisions about their futures with incomplete information.
This new survey will enable:
Flood and inundation modelling – precisely mapping which areas flood under cyclones, storm surge, and sea-level rise scenarios.
Coastal risk maps – identifying areas most vulnerable to coastal flooding and guiding future decisions on infrastructure, coastal management and community protection.
Sea-level rise planning – modelling impacts under half a metre, one metre, two metre, and four metres of sea-level rise.
Infrastructure investment – helping identify low-risk areas for future development and steering investment away from the highest-risk zones.
This is, at its core, a story about knowledge. Planning coastal infrastructure without knowing precisely how much land sits above a one-metre flood line, preparing for disasters without granular data on where the water will go first. The LiDAR baseline being built now changes that. It puts Tonga in the room not as a supplicant but as a nation with evidence, with data, with a seat at every table that matters.
That matters enormously as October approaches. Fiji will host a pre-COP meeting this year, and the Pacific's voice in global climate negotiations has never been more consequential. What Tonga is doing, an approach that is methodical, technical, and nationally-owned, is the kind of leadership that earns that voice.
“Infrastructure, investment, and empowerment to leave no one behind. These are investments in our future, and the time is now,” Lord Fakafanua said.
The TCRP project is not waiting. The 2026 survey builds on earlier work stretching back to 2012, stitching together datasets from the Australian Government, the World Bank, and now the Green Climate Fund into a single, unified national picture. SPC's geospatial experts, a technical team from Fugro, and Tonga's own national mapping specialists are working side by side to ensure that when the aircraft departs, the knowledge stays, embedded in institutions, in people, and in capacity that endures.
From above, Tonga still looks scattered. A sea of islands, beautiful but exposed. But look closer. There are people here making careful, serious decisions about the future. Mapping the ground beneath their feet. Building the evidence base that will inform where a seawall goes, which road gets raised, which community needs to move.
Tonga is doing the work. And in a year when the world will gather to talk about climate ambition, that is worth saying clearly.